<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/index' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-alert
        title="注意：只允许为第三级分类设置参数!"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>

      <!-- 选择商品的列表 -->
      <el-row class="cat_opt">
        <span>选中商品分类: </span>
        <!-- 分类的级联选中框 -->
        <el-cascader
          v-model="selectedCateKeys"
          :options="catalist"
          :props="cateProps"
          expandTrigger="hover"
          @change="handleChange"
        ></el-cascader>
      </el-row>
      <!-- tab 页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDialogVisble = true"
            >添加参数</el-button
          >
          <!-- 动态属性的表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column label="#" type="expand"></el-table-column>
            <!-- 索引列 -->
            <el-table-column label="#" type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  size="mini"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button type="danger" size="mini" icon="el-icon-delete"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDialogVisble = true"
            >添加属性</el-button
          >
          <!-- 静态属性的表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column label="#" type="expand"></el-table-column>
            <!-- 索引列 -->
            <el-table-column label="#" type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  size="mini"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button type="danger" size="mini" icon="el-icon-delete"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加参数的对话框 -->
    <el-dialog
      @close="addDIalogClosed"
      :title="'添加' + titleText"
      :visible.sync="addDialogVisble"
      width="50%"
    >
      <!-- 添加参数的对话框 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisble = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改参数的对话框 -->
    <el-dialog
      @close="editDIalogClosed"
      :title="'修改' + titleText"
      :visible.sync="editDialogVisble"
      width="50%"
    >
      <!-- 添加参数的对话框 -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisble = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 商品分类的数据
      catalist: [],
      // 级联选择框的配置对象
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      // 级联选择框的双向绑定数组
      selectedCateKeys: [],
      // 被激活的页签的名字
      activeName: "many",
      // 这是动态参数的数据
      manyTableData: [],
      // 这是静态属性的数据
      onlyTableData: [],
      // 控制添加对话框的显示与隐藏
      addDialogVisble: false,
      // 添加参数的表单数据对象
      addForm: {
        attr_name: "",
      },
      // 添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      // 控制显示隐藏
      editDialogVisble: false,
      // 修改的表单数据对象
      editForm: {},
      // 修改表单的验证规则
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
    };
  },

  created() {
    this.getCataList();
  },

  methods: {
    async getCataList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类失败!");
      }
      // 讲商品分类的数据保存到data中
      this.catalist = res.data;
      // console.log(this.catalist);
    },
    // 级联选择框变化回触发这个方法
    async handleChange() {
      this.getParamsData();
    },
    // 获取参数的列表数据
    async getParamsData() {
      // console.log(this.selectedCateKeys);
      // 证明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = [];
        return;
      }
      // 证明选中是三级分类
      console.log(this.selectedCateKeys);
      // 根据所选分类的id和当前所处的面板获取对应的参数
      const { data: res } = await this.$http.get(
        `categories/${this.catrID}/attributes`,
        { params: { sel: this.activeName } }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("参数获取失败!");
      }
      console.log(res.data);
      if (this.activeName === "many") {
        this.manyTableData = res.data;
      } else {
        this.onlyTableData = res.data;
      }
    },
    // tab页签点击事件的处理函数
    handleTabClick() {
      console.log(this.activeName);
      // this.getParamsData();
    },

    addDIalogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    // 点击按钮添加参数
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return;
        }
        const { data: res } = await this.$http.post(
          `categories/${this.catrID}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (res.meta.status !== 201) {
          this.$message.error("添加参数失败!");
        }
        this.$message.success("添加参数成功!");
        this.addDialogVisble = false;
        this.getParamsData();
      });
    },
    // 点击按钮展示修改的对话框
    async showEditDialog(attr_id) {
      // 查询当前参数的信息
      const { data: res } = await this.$http.get(
        `categories/${this.catrID}/attributes/${attr_id}`,
        { params: { attr_sel: this.activeName } }
      );
      if (res.meta.status != 200) {
        return $message.error("获取参数数据失败!");
      }
      this.editForm = res.data;
      this.editDialogVisble = true;
    },
    // 重置修改的表单
    editDIalogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 点击按钮修改信息
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) {
          return;
        }
        const { data: res } = await this.$http.put(
          `categories/${this.catrID}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("修改参数失败!");
        }
        this.$message.success("修改参数成功!");
        this.getParamsData();
        this.editDialogVisble = false;
      });
    },
  },

  computed: {
    // 如果按钮需要被禁用则返回true,否则返回false
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true;
      }
      return false;
    },
    // 当前选中的三级id
    catrID() {
      if (this.selectedCateKeys.length == 3) {
        return this.selectedCateKeys[2];
      }
      return null;
    },
    //动态计算标题的文本
    titleText() {
      if (this.activeName == "many") {
        return "动态参数";
      } else {
        return "动态属性";
      }
    },
  },
};
</script>

<style lang="scss" scoped>
.cat_opt {
  margin: 15px 0;
}
</style>